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Research on influence of preform manufacture parameters on properties of carbon/carbon composites

机译：瓶坯制造参数对碳/碳复合材料性能影响的研究

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摘要

Needle-punched carbon fiber performs possessing high designable characteristic, good global property and high anti-shear strength have been used widely as reinforcement framework of high temperature composites for aerospace application. Influences of the needle-punched density and its depth as well as the plane density of fiber felt on the fibre bulk fraction of perform and the properties of carbon/carbon composites are investigated. The relation between mechanical properties of the composites and the density of preform is analyzed forecasting. It has been shown that by the test, With the increasing of the needle-punched density from 20p/cm2 to 50p/cm2, the tensile strength increases first and then decreases, but the interlaminer shear strength increases; The tensile strength and the interlaminer shear strength all increase with the increasing of needle-punched depth from 10mm to 16mm , while decrease with the increasing of plane density of fiber felt before 300g/m~2. Simulating by origin software when only one of the needle-punched density , its depth and plane density of fibre felt changes, the preform density influences the tensile strength and interlaminer shear strength remarkably. So preforms density can forecast the properties of carbon/carbon composites as macro-parameter.
机译：针刺碳纤维性能具有很高的可设计性，良好的整体性能和高的抗剪切强度，已被广泛用作航空航天应用的高温复合材料的增强骨架。研究了针刺密度，针刺深度，纤维毡的平面密度对纤维性能和碳/碳复合材料性能的影响。分析了复合材料力学性能与预成型坯密度之间的关系。试验表明，随着针刺密度从20p / cm2增加到50p / cm2，抗拉强度先增大后减小，而层间剪切强度增大。拉伸强度和层间剪切强度均随针刺深度从10mm增加到16mm而增加，而随300g / m〜2前纤维毡平面密度的增加而降低。通过Origin软件进行模拟，当针刺密度，其深度和纤维毡的平面密度中只有一种发生变化时，预成型坯密度会显着影响拉伸强度和层间剪切强度。因此，瓶坯密度可以作为宏观参数预测碳/碳复合材料的性能。

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